68666827 has 4 divisors (see below), whose sum is σ = 68700520. Its totient is φ = 68633136.

The previous prime is 68666821. The next prime is 68666831. The reversal of 68666827 is 72866686.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72866686 = 2 ⋅36433343.

It is a cyclic number.

It is not a de Polignac number, because 68666827 - 2⁷ = 68666699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68666821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13578 + ... + 17935.

It is an arithmetic number, because the mean of its divisors is an integer number (17175130).

Almost surely, 2^68666827 is an apocalyptic number.

68666827 is a deficient number, since it is larger than the sum of its proper divisors (33693).

68666827 is a wasteful number, since it uses less digits than its factorization.

68666827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33692.

The product of its digits is 1161216, while the sum is 49.

The square root of 68666827 is about 8286.5449374272. The cubic root of 68666827 is about 409.4953676469.

The spelling of 68666827 in words is "sixty-eight million, six hundred sixty-six thousand, eight hundred twenty-seven".